Infineon Technologies IFX24401ELV50XUMA1

Overview

IFX24401ELV50XUMA1 from Infineon Technologies is a monolithic low-dropout linear voltage regulator delivering 5.0 V ±2% output at up to 300 mA, with 250 mV typical dropout at 200 mA, 20 µA typical quiescent current, and operation across –40 °C to 125 °C junction temperature. It features enable control, short-circuit and overtemperature protection, and supports stable regulation with ≥470 nF ceramic output capacitors - ideal for battery-powered GPS receivers.

For engineers reviewing the IFX24401ELV50XUMA1 datasheet, IFX24401ELV50XUMA1 pinout, IFX24401ELV50XUMA1 application, or IFX24401ELV50XUMA1 equivalent, key selection considerations include its 45 V max input voltage, integrated pull-down on EN, reverse-current sink limiting output voltage to ≤5.5 V, and PG-SSOP-14 thermal performance (R_thJA = 120 K/W footprint-only).

Technical Context

The IFX24401ELV50XUMA1 implements a bandgap-referenced LDO architecture with charge-pump-assisted gate drive for low-dropout operation. Its internal protection logic triggers thermal shutdown above 150 °C and limits output current to 320 mA (typ.) before foldback.

It accepts input voltages from 5.5 V to 42 V and maintains regulation under line variations (±20 mV line regulation) and load steps (±40 mV load regulation). The EN pin integrates a pull-down resistor and supports TTL-compatible logic thresholds: turn-on at ≥3.1 V, turn-off at ≤0.8 V.

Key Specifications

Pinout & Package

IFX24401ELV50XUMA1 is packaged in PG-SSOP-14 (lead pitch 0.65 mm, body size 5.0 × 6.0 mm), with exposed thermal pad connected to GND for enhanced heat dissipation. Pin 13 is input (I), pin 4 is ground (GND), pin 6 is enable (EN), pin 9 is regulated output (Q), and pins 1,2,3,5,7,8,10,11,12,14 are no-connect (NC) - internally isolated and may be tied to GND or left floating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout voltage regulator applications.

Compared with TLE42744G and MCP1703T-5002E/MB, IFX24401ELV50XUMA1 uniquely combines 45 V input tolerance, 300 mA capability, enable control, and reverse-current protection - making it the only option among the three qualified for 24 V industrial battery systems requiring robust 5 V regulation with minimal external components.

Availability

IFX24401ELV50XUMA1 is available at Aetrix Electronics and suitable for handheld GPS receivers, portable radios, HDTV set-top boxes, and network routers requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for IFX24401ELV50XUMA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, and industrial control solutions, with global manufacturing and quality certification to ISO/TS 16949 and ISO 14001.

The IFX24401 belongs to Infineon's high-voltage LDO product line, engineered for harsh-environment applications including transportation, industrial automation, and battery-powered consumer electronics where input voltage variability and thermal stress are critical design constraints.

FAQ

What is the minimum output capacitance required for stable operation?

The IFX24401ELV50XUMA1 requires a minimum 470 nF ceramic capacitor between Q and GND, rated for worst-case ±30% tolerance and ≤10 Ω ESR at 10 kHz. This value ensures phase margin and transient response meet specification across –40 °C to 125 °C, as validated in the functional range test conditions on page 6 of the datasheet.

Does the device support reverse current flow from output to input?

Yes - an integrated output sink circuit actively clamps the Q pin voltage to ≤5.5 V during reverse bias, preventing damage to downstream 5 V logic. This feature operates independently of EN state and does not require external diodes, enabling safe hot-swap and back-powering scenarios.

Can IFX24401ELV50XUMA1 operate with input voltages below 5.5 V?

No - the absolute minimum input voltage is 5.5 V per the functional range table (page 6). Operation below this threshold violates guaranteed regulation; output voltage will drop out of specification, and internal reference circuitry may become unstable. For sub-5.5 V inputs, a different LDO family must be selected.

How is thermal performance affected when the exposed pad is not soldered to PCB GND?

Leaving the exposed pad unsoldered increases junction-to-ambient thermal resistance from 120 K/W to >200 K/W, causing excessive temperature rise at 300 mA load. This risks premature thermal shutdown or accelerated parametric drift. Infineon specifies mandatory soldering of the pad to a GND plane with ≥300 mm² copper area for reliable full-load operation.